Bug Fix: Game over when character falls into gap about crazyrabbit

[Adamkzh]

1. I come with the idea that add a Trigger in the hole, or some where that will cause damage to the player.
2. Use coordinate combined with the player position.
   I prefer the first one, we can set the Trigger damage in hole at Max value, for other things we can cause little damage. Make sense >.<~

[manymeeting]

Close as solved in another issue #39